If the momentum of a photon is p, then its frequency is

(a) $\frac{\mathrm{ph}}{\mathrm{c}}$           (b) $\frac{\mathrm{pc}}{\mathrm{h}}$

(c) $\frac{\mathrm{mh}}{\mathrm{c}}$           (d) $\frac{\mathrm{mc}}{\mathrm{h}}$

where m is the rest mass of the photon

Concept Questions :-

De-broglie wavelength
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

An AIR station is broadcasting the waves of wavelength 300 metres. If the radiating power of the transmitter is 10 kW, then the number of photons radiated per second is

(a) $1.5×{10}^{29}$              (b) $1.5×{10}^{31}$
(c) $1.5×{10}^{33}$              (d) $1.5×{10}^{35}$

Concept Questions :-

Electron emission
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The energy of a photon is E = hv and the momentum of photon $\mathrm{p}=\frac{\mathrm{h}}{\mathrm{\lambda }}$, then the velocity of photon will be

(a) E/p                      (b) Ep

(c)  ${\left(\frac{\mathrm{E}}{\mathrm{P}}\right)}^{2}$                  (d)

Concept Questions :-

De-broglie wavelength
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The approximate wavelength of a photon of energy 2.48 eV is
(a) 500 Å                    (b) 5000 Å
(c) 2000 Å                   (d) 1000 Å

Concept Questions :-

De-broglie wavelength
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The momentum of a photon in an X-ray beam of ${10}^{-10}$ metre wavelength is
(a) $1.5×{10}^{-23}$  kg-m/sec               (b) $6.6×{10}^{-24}$ kg-m/sec
(c) $6.6×{10}^{-44}$ kg-m/sec                (d) $2.2×{10}^{-52}$  kg-m/sec

Concept Questions :-

De-broglie wavelength
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Energy of a quanta of frequency ${10}^{15}$ Hz and  will be
(a)             (b)
(c)             (d)

Concept Questions :-

Particle nature of light
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Momentum of a photon of wavelength $\mathrm{\lambda }$ is

(a) $\frac{\mathrm{h}}{\mathrm{\lambda }}$            (b) Zero
(c) $\frac{\mathrm{h\lambda }}{{\mathrm{c}}^{2}}$          (d) $\frac{\mathrm{h\lambda }}{\mathrm{c}}$

Concept Questions :-

Particle nature of light
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

Wavelength of a 1 keV photon is . What is the frequency of 1 MeV photon

(a)       (b)
(c)       (d)

Concept Questions :-

Particle nature of light
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

What is the momentum of a photon having frequency ?
(a)                 (b)
(c)                 (d)

Concept Questions :-

Particle nature of light
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The energy of a photon of light of wavelength 450 nm is

(a)               (b)
(c)             (d)

Concept Questions :-

De-broglie wavelength